Trophic polymorphism in introduced bluegill in Japan

  title={Trophic polymorphism in introduced bluegill in Japan},
  author={Ryuji Yonekura and Katsuki Nakai and Masahide Yuma},
  journal={Ecological Research},
We demonstrate that bluegill (Lepomis macrochirus) introduced from their native North American source to Lake Biwa in Japan showed considerable trophic and morphological variations (morphs). Three morphs were found for larger bluegills, specialized in three distinct resources (i.e. plankton, benthic invertebrates and aquatic plant), and two morphs were found for smaller bluegills, specialized in two slightly different prey taxa (i.e. calanoid and cyclopoid plankton). These morphs, especially… CONTINUE READING
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